Eirepbooe boob ob



W.` H. PATTERSON.

FIREPROOF DOOR 0R SHUTTER.

APPLICATION FILED NOV-29, ISIS.

1 ,307,876 Patented June 24, 1919.

3 SHEETS-SHEET I.

W. H. PATTERSON.

.FmEPRooF nooa 0R SHUTTER.

APPLICATION FILED NOV. 29. 1916.

Paterltedy June 24, 1919.

3 SHEETS-SHEET 2.

W. H. PATTERSON.

FIREPROOF DOOR 0R SHUTTER.

Patented June 24, 1919.

3 SHEETS SHEET 3.

rrirp STATES PATENT 'OFFWE WILLIAM H. PATTERSON, F NEW ORLEANS, LOUISIANA.

FIREPROOF DOOR 0R SHUTTER.

i To all whom it may concern Be it known that L WILLIAM H. PATTER- @lil at New Urleans, in the parish of Orleans and State of Louisiana, have invented new and `useful Improvements in Fireproof Doors or Shutters, of which the following is a `specification. l"

My present invention pertains tto lireproof doors or shutters, the term door as hereinafter employed being intended-to cornprehend shutters and other closures as well as sliding and swinging doors.

My said'invention contemplates the pro-v vision of an eiiicient fireproof door, susceptible of being cheaply manufactured, and.

constructed in such manner that itis nished in appearance and yet is well adapted to prevent the transmission of heat from one of itssides to the other and is otherwise enabled to withstand the action of a high degree of heat without warping or twisting or other deterioration. y

lWith the foregoing in mind the invention will be fully understood from the following description and claims when the same are read in .connection with the drawings, accompanying and forming part of this specification, in which: y

Figure 1 is a front elevation of a sliding door constructed in accordance with my in vention and equipped with the usual appurtenances.

Fig. 2 is an enlarged detailed horizontal section takenl in the plane indicated by the i line 2--2 of F ig. 1..

Fig. 3 is a similar view on the line 34-3 of Fig. 1.

Fig. 4 is a detail horizontal section-illustrating the upright expansion bars comprised in the. door.

Fig. 5 is a detailed vertical section taken on the line 5-5 of Fig. 1.

Fig. 6 is a detail vertical section showing the horizontal reinforcing member hereinafter specifically referred to.

Fig. 7 is a detail vertical section showing the relative arrangement of the asbestos filler, while Fi 7il is an elevation showing the corner castings, sidestiles and base and crown bars o-f the door in proper relative arrangement.

Figs. 8, 9, 10, 11 and 12 are views of modi- `fications hereinafter specically referred to.

' Specification of Letters Patent. pgmgntgd Jun@ 249 191g .application ined November 29, 191s.

Serial No. 134,085.

ed flanges 6;

Extended betweenV and connected with the said stiles and bars of the door frame are spaced sheet-metal walls 8; the said walls being provided with upright corrugatio-ns,

' preferably though not necessarily, of obtuse angle' form in horizontal section, and arranged with the said corrugations in opposed relation as shown in Figs. 2, 3. and 4, so as to .afford air spaces of conside able size. The said walls 8 extend between the flanges of the side stiles 3, but by reference to Figs. 5 and?, it will be noted that the walls eXtendoutside of and lap the flanges of the base bar l and the crown bar 5, with the result that the construction is finished in appearance and is calculated to prevent moisture gaining access to the interior of the door.

The walls 8 are formed insections, Figs. 1 and Il, and the sections of each wall are oined through the mediumV of expansion ars 9* (one or more). The said expansion bars are disposed vertically and are respectivel formed by interlocking portions of adJoinin wall sections as best shown in Fig. 4. anifestly the said bars permit of expansionland contraction of the walls without warpingl or twisting thereof.

Arranged between the walls 8 and extending throughout the area of the door is an asbestos sheet 10 which serves in conjunction with the closed air space to prevent the transmission of heat from one wall to the other.

Extending between and riveted or otherwise lixedly connected to the opposedV walls 8 and arranged at an intermediate point in the height of the door is a reinforcing strip 11 formed by bending a sheet of metal upon itself. The said strip 11 in addition to stiff- `ening and lending increased rigidity and strength to the door, assists in maintaining'- the walls in opposed and spaced relation. It is to be understood in this connection that the strip 11 is riveted or otherwise connected to the flanges 6 of the side stiles 3. It w1ll also be noticed by reference to Fig. 7 that the asbestos sheet 10 is secured by rivets between the flanges-G of' the crown bar 5 fr o-m which it is hung with its side edges resting adjacent to the flanges 6 of stiles 3, Fig. 2, and its lower edge resting adjacent to the flanges 6 of fhebase bar 4,Fig. 5.

Castings 12 are disposed in the lower and upper corners of the door as will be understood by comparison of Figs. 3 5 and 7a which show the arrangement of the castmgs within and between the side stiles 3, on the one hand, and the base bar 4 and crown bar 5, on the other.

The corner castings 12 respectively comprise the major right-angle portion, of H- form in cross section, shown by full lines in Figs. 3 and 5 and by dotted lines in Fig. 7, and a shank or web 13 which extends between the outer ends of the arms of the right angle portion and is designed to rest between the flanges 6, and also between the walls 8 and alongside the pendent asbestos sheet 10. Each corner casting also comprises a corner block 12 against which the end of one side stile 3 and one horizontal bar (base bar 4 or crown bar 5) abut as clearly shown in Fig. 7a. By virtue of the said construction and relative arrangement, the corner castings 12 lend great stiffness and strength to the door and preclude sagging of the same as well as distortion or other deterioration when the door is subjected to the action of a high degree of heat. The said corner castings 12 also prevent injury to the door when it brings up against a stop (not shown), and in this the said castings are assisted by the reinforcing bar 11. The corner castings are connected with the said frame bars of the door by rivets which extend through the flanges of the frame bars and the shanks or webs of the corner castings, and this assists materially in the described capacity of the corner castings.

As will be seen by comparison of Figs. 2 and 7, an asbestos filler 1 4 is arranged between the flanges 6 of each side stile and the flan es 6 of the crown bar 5 and the base bar 4. e asbestos filler in the base bar 4 is not shown, but it will lbe readily understood that its arrangement relative to the flanges of' the base bar 4 is the saine as its arrangement relative'to the flanges of the crown bar 5. Each asbestos filler 14 occupies the space between `adjoining ends of the flanges 13 of corner castings 12, and serves the important purpose of filling the space between and holding the flanges 6 apart at the points between the several corner castings 12.

ystiles and bars and exten In Figs. 8, 9 and 10 is shown a swinging door similar in construction to the sliding door shown in l4`igs. 1-7, Fig. S) being taken in the plane indicated by the line 9-9 of Fig. 8, and Fig. 1() comprising a finished portion of the door together withone corner casting, one hollow frame bar and an assembly of"one frame bar, the opposed walls and the interposed asbestos sheet. The said swinging door is arranged to close against a hollow frame 15, as shown in Figs. 8 and 9.

In the modification shown in Fig. 11 no corner castings are employed. On the other hand the side stile, 3 and the horizontal bar 5 that meets the same are brazed-so as to make a seamless joint at 16.

In the modification shown in F ig. 12, corner castings are employed, but the same are d1fl'erent in construction and arrangement from the corner castings of Figs. 1 to 10. The modified corner casting 12x has solid major portions disposed at right angles to each other, and a shank or web 13x extending between the end portions of the major arms or portions. The said solid portions' 12x are arranged in the meeting stile and horizontal bar of the frame, while the web or shank 13x is arranged and secured between the flanges of the frame members, with the result that the door is braced and strengthened almost if notl quite to the extent that obtains in the construction shown in Figs. 1 to 7a.

Having described my invention, what I claim and desire to secure by Letters-Patent, is:

1. A fire-proof door or shutter comprising a frame having side stiles and base and crown bars; and spaced walls of corrugated sheet-metal arranged in said frame and connected therewith; each of said walls being formed of sections the adjacent portions of which are interlocked and connected together by the interlocking, whereby expansion bars are formed in the walls, in combination with a reinforcing strip, of sheetmetal bent upon itself, extending between and connected to opposite frame portions and interposed between and connected to the spaced sheet-metal walls.

2. In a fire-proof door or shutter, the combination of a frame comprising a bottom bar, crown bar and hollow side Stiles, each having inwardly-directed parallel flanges, and corner castings arranged within and between the side stiles on the one hand, and the base bar and crown bar, on the other, and having webs resting between and connected to the inwardly-directed flanges of said stiles and bars; asbestos fillers interposed between and connected to the flan es on the frame ing and occupying the spaces between the webs ofthe corner castings, spaced sheet-metal walls arranged in and carried by said frame; the

said walls extending between and being connected with the inwardly-extending flanges of the side pstiles, and resting outside of and being connected with the inwardly extending flanges of the base bar and crown bar, and a pendent asbestos sheet restingv between the sheetnietal walls and adjacent and in spaced relation to the base bar and the side stiles and having its upper end portion inter- 10 posed and secured between the lianges of the crown bar, whereby it is suspended from nesses.

WILLIAM H. PATTERSON.

Witnesses:

M. E. KNIGHT, R. G. EUsT1s.` 

